I bought these online and used them for 6 days in Tionesta, PA the week after opening day. I fly fish a lot and after the 5th day, they leaked at the knee right where the seam was folded during shipping. The material was very weak and I would not trust them enough to replace them with another pair. It's a shame too, because I was really liking them up to that point. I returned them to my local Gander Mountain at Robinson, PA and they took great care of me there, returning them with no problem at all.